나는 docker 내의 포트 80을 호스트 컴퓨터의 20080에 노출하는 docker 응용 프로그램을 실행하는 Linux 서버를 가지고 있습니다.
서버에 IP 주소가 있으므로 해당 포트 에 대한 액세스를 10.10.10.10차단해야 합니다 .10.10.10.1110.10.10.10:20080
그러나 INPUT 체인에 DROP을 추가해도 효과가 없으며 포트에 계속 액세스할 수 있습니다. 어떤 아이디어가 있나요?
첨부된 내용은 전체 iptables 규칙입니다.
# iptables-save
# Generated by iptables-save v1.8.7 on Thu Jul 6 22:26:24 2023
*filter
:INPUT ACCEPT [0:0]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [0:0]
:DOCKER - [0:0]
:DOCKER-ISOLATION-STAGE-1 - [0:0]
:DOCKER-ISOLATION-STAGE-2 - [0:0]
:DOCKER-USER - [0:0]
-A INPUT -p tcp -m tcp --dport 20080 -j DROP
-A FORWARD -p tcp -m tcp --dport 20080 -j DROP
-A FORWARD -j DOCKER-USER
-A FORWARD -j DOCKER-ISOLATION-STAGE-1
-A FORWARD -o docker0 -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
-A FORWARD -o docker0 -j DOCKER
-A FORWARD -i docker0 ! -o docker0 -j ACCEPT
-A FORWARD -i docker0 -o docker0 -j ACCEPT
-A FORWARD -o br-643859f655c0 -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
-A FORWARD -o br-643859f655c0 -j DOCKER
-A FORWARD -i br-643859f655c0 ! -o br-643859f655c0 -j ACCEPT
-A FORWARD -i br-643859f655c0 -o br-643859f655c0 -j ACCEPT
-A DOCKER -d 172.17.0.4/32 ! -i docker0 -o docker0 -p tcp -m tcp --dport 80 -j ACCEPT
-A DOCKER -d 172.17.0.4/32 ! -i docker0 -o docker0 -p tcp -m tcp --dport 22 -j ACCEPT
-A DOCKER-ISOLATION-STAGE-1 -i docker0 ! -o docker0 -j DOCKER-ISOLATION-STAGE-2
-A DOCKER-ISOLATION-STAGE-1 -i br-643859f655c0 ! -o br-643859f655c0 -j DOCKER-ISOLATION-STAGE-2
-A DOCKER-ISOLATION-STAGE-1 -j RETURN
-A DOCKER-ISOLATION-STAGE-2 -o docker0 -j DROP
-A DOCKER-ISOLATION-STAGE-2 -o br-643859f655c0 -j DROP
-A DOCKER-ISOLATION-STAGE-2 -j RETURN
-A DOCKER-USER -j RETURN
COMMIT
# Completed on Thu Jul 6 22:26:24 2023
# Generated by iptables-save v1.8.7 on Thu Jul 6 22:26:24 2023
*nat
:PREROUTING ACCEPT [0:0]
:INPUT ACCEPT [0:0]
:OUTPUT ACCEPT [0:0]
:POSTROUTING ACCEPT [0:0]
:DOCKER - [0:0]
-A PREROUTING -m addrtype --dst-type LOCAL -j DOCKER
-A OUTPUT ! -d 127.0.0.0/8 -m addrtype --dst-type LOCAL -j DOCKER
-A POSTROUTING -s 172.17.0.0/16 ! -o docker0 -j MASQUERADE
-A POSTROUTING -s 172.18.0.0/16 ! -o br-643859f655c0 -j MASQUERADE
-A POSTROUTING -s 172.17.0.4/32 -d 172.17.0.4/32 -p tcp -m tcp --dport 80 -j MASQUERADE
-A POSTROUTING -s 172.17.0.4/32 -d 172.17.0.4/32 -p tcp -m tcp --dport 22 -j MASQUERADE
-A DOCKER -i docker0 -j RETURN
-A DOCKER -i br-643859f655c0 -j RETURN
-A DOCKER ! -i docker0 -p tcp -m tcp --dport 20080 -j DNAT --to-destination 172.17.0.4:80
-A DOCKER ! -i docker0 -p tcp -m tcp --dport 20022 -j DNAT --to-destination 172.17.0.4:22
COMMIT
# Completed on Thu Jul 6 22:26:24 2023